Special characters are not support in operation policies such as "Add Header"
Description:
We cannot give special characters to some operation policy attributes such as the Header Value of the Add Header Policy.

These situations should be allowed. (A problem in the Regex)
Not Reproducible in WSO2 API Manager 4.6.0
This issue is not reproducible in WSO2 API Manager 4.6.0.
Test Results
Tested: "Add Header" operation policy with special characters in header value
Input: /test* (forward slash and asterisk)
Result: Saved successfully without validation errors
Analysis
A validation framework for operation policy attributes was introduced in February 2022 (commit cbb45dc13ed), which allows policies to optionally define validationRegex patterns. However, the built-in "Add Header" policy does not have a restrictive regex defined, allowing special characters to be used freely in header values.
Code locations:
-
components/apimgt/org.wso2.carbon.apimgt.impl/src/main/java/org/wso2/carbon/apimgt/impl/APIProviderImpl.java(lines 2611-2618) -
apim-apps/portals/publisher/.../AttachedPolicyForm/General.tsx(lines 288-302)
Conclusion
Special characters including semicolons, asterisks, and forward slashes can be used in the "Add Header" policy's header value field without validation errors.
Tested on: WSO2 API Manager 4.6.0 Status: Not Reproducible
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